Roof covering and method of manufacturing same



Dec. 4, 1934. Q FISCHER 1,983,495

ROOF COVERING AND METHOD OF MANUFACTURING SAME Filed June 25, 1928' INVENTOR.

ATTORNEY.

Patented Dec. 4, 1934 UNITED STATES ROOF COVERING AND METHOD OF -MANUFACTURING SAME' Albert C. Fischer, Chicago, Ill., assignor The Philip Carey Manufacturing Company, a corporation of Ohio Application June 25, 1928, Serial No. 288,302

Claims. (Cl. 108-6) This invention relates to weatherproofing elements, particularly prepared sheet roofing, and aims to provide a plurality of layers suitable for being laminated into a composite covering on 5 the job without employing any agent for attaching the sheets other than the prepared sheets themselves.

The invention eonsistsin the features, combinations, and arrangements hereinafter described or claimed, for'carrying out the above stated object, and such other objects as will hereinafter appear.

For a better understanding of the invention reference may be made to the accompanying drawing, -in which Fig. 1 is a perspective view of .a roofing roll embodying the invention, and

Fig. 2 is a cross-sectional view of a roof section showing the invention applied to. a roof deck.

In general the invention comprises a plurality of waterproofing sheets which are so prepared that they may be readily adhered into a composite laminated structure. In building up this structure, at least three sheets should be employed, but more may be used if a thicker covering is desired. Of these sheets one comprises a foundationwhich is first attached to the surface to be covered, another sheet is normally adhesive on both faces and may be conveniently referred to as a wet sheet. After the wet sheet is attached to the foundation sheet an adhesive surface is provided for receiving the third or weather sheet, this latter being preferably sur- 35 faced on its weather side with granular material partially embedded therein. Should a composite covering be desired thicker than that provided by the three layers, then any additional number of wet or foundation sheets could be included between the foundation and weather sheets.

More specifically described, the base sheet 1 is a saturated felt coated on one or both sides with a layer 2 of asphalt. A small amount of pow: dered material such as talc may be'dusted over the coating; altho it is preferable to leave one face free so that it will be in a more receptive condition for bonding with the wet sheet 3. The wet sheet 3 is normally. adhesive or .sticky at ordinary temperatures, in which condition it will readily adhere to the other sheets. The mastic, 'saturant or coating 4, as the case may be, of this wet sheet is in a condition which has solvent action, and by reason of such solvent action will bind itself to adiacent layers in which the asphalt is of a harder nature. The weather sheet 5 may be a plastic layer-or a saturated felt coated with bituminous material 6. One face may be surfaced with granular material such as slate, stone, gravel or like particles '7, partially embedded to provide additional weather material on the exposed side.

These sheets may be rolled and shipped in separate packages, as is customary in roll roofing, and properly marked to indicate the various kinds, such as the foundation sheet, wet sheet, or weather sheet. To keep the wet sheet in the proper adhesive condition in which it was prepared, it is preferably covered with an oilproof wrapper waxed or silicate coated as at 8. If it is not desirable that each square of roofing be shipped in three separate packages, the wet sheet may be wrapped in an oilproof covering and then rolled within the other sheets. In this manner three squares of roofing would be placed in one roll 9. Additional intermediate sheets, such as the base and wet sheets may be included if more than a three-ply roof is desired. However, it is preferable that the sheets be sufficiently heavy to give an adequate covering with three plies of the roofing materialapplied to a base or roof deck 10 in the manner illustrated in Fig. 2 of the drawing.

While I have referred to the three layers as sheets, it will be understood that the weather sheet may be in the form of individual roofing elements laid in overlapping relation or in the form of a plastic coating layer applied directly to the wet sheet. All of the sheets will be so laid as to break joints with each other.

Obviously the invention is not limited to the details described, all of which may be variously modified. Moreover it is not indispensable that all features of the invention be used conjointly as certain features may be employed to advantage in various different combinations and subcombinations.

Having described my invention, I claim:

1. The method of manufacturing self-adhering roofing units characterized by fabricating a plurality of individual sheets comprising a bitufacing sheet, and a securing sheet provided on both faces with a normally sticky adhesive coat sheet, a weather-surfacing sheet, and a securing minous coated foundation sheet, a weather sufsheet provided on both faces with a'normally sticky adhesive coating which is adapted to bond with the foundation and weather sheets, all of which are superposed with the securing sheet interposed between the other sheet elements.

3. A roofing package containing a self-adhering roofing unit which comprises a foundation sheet; a weather surfacing sheet having one face covered with granular material, and a securing sheet provided on both faces with a normally sticky adhesive coating which is adapted to bond with the foundation and weather sheets, all of which are superposed with the securing sheet interposed between the other sheet elements.

4. The method of forming a built-up roof covering characterized by applying to the surfaceto' be covered a bituminous coated foundation sheet, applying to the foundation sheet a bonding layer provided on both faces with a normally sticky adhesive coating, and overlaying the bonding layer with a weather exposed sheet.

5. The method of forming a built-up roof covering characterized by applying to the surface to be covered a. bituminous coated foundation sheet, adhering to the foundation sheet a bonding'layer provided on its opposite face with a normally sticky adhesive coating, and applying a weather exposed sheet to the bonding layer whereby same are self-adhesively secured by the normally sticky adhesive coating.

ALBERT C. FISCHER. 

